refactor to use exception helper factories

src/luma_luma_source.rs

@@ -95,9 +95,9 @@ impl LuminanceSource for Luma8LuminanceSource {
     }
 
     fn rotateCounterClockwise45(&self) -> Result<Box<dyn LuminanceSource>, crate::Exceptions> {
-        Err(crate::Exceptions::UnsupportedOperationException(Some(
+        Err(crate::Exceptions::unsupportedOperation(
             "This luminance source does not support rotation by 45 degrees.".to_owned(),
-        )))
+        ))
     }
 }